1746-IB8 SLC 500 Digital DC Input Module by Allen-Bradley

Product Overview

The Allen-Bradley 1746-IB8 is a digital DC input module. It belongs to the SLC 500 series. This module has eight 24V DC sinking inputs. It operates within a 10-30V DC range. The nominal voltage is 24V DC. The backplane current is 50mA at 5V DC. It has 0.0mA at 24V DC. The signal delay is 8ms for both ON and OFF modes. The off-state current is 1mA. The module dissipates 1.3W of heat. It has a thermal dissipation of 4.4 BTU per hour.

Application Scenarios

This module works for general purpose DC inputs. Use it in manufacturing and process control. It connects with 1746-HT and 1746-HCA cables. The module suits industrial automation tasks. It handles discrete sensor signals. It works well in harsh environments. The operating temperature range is 0 to 60 °C. Humidity tolerance is 5-95% non-condensing. It has 2.5G vibration rating at 57-500Hz. The shock rating is 30G.

Technical Specifications

The 1746-IB8 has a step response of 100ms in and 2.5ms out. The maximum off-state voltage is 5.0V DC. The nominal input current is 8mA at 24V DC. Each point dissipates 0.27W maximum. The dielectric withstand is 1500V AC. Isolation between backplane and inputs is 1500V AC. Communication circuits test at 500V. The module has UL and CE certification. It meets NEMA ICS 2-230 for noise immunity.

Installation & Maintenance Guide

Install the 1746-IB8 module into a SLC 500 chassis. Ensure power is off before insertion. Use the correct I/O connection cables. Tighten screws to secure the module. Check backplane current limits. Do not exceed 50mA at 5V DC. Clean the module with a dry cloth. Avoid moisture and extreme temperatures. Test inputs periodically for proper function. Replace the module if it shows damage.

Packing List

One 1746-IB8 module. One installation guide. No additional accessories included. The module ships in anti-static packaging. Shipping uses Fedex, UPS, or DHL. The package weight is 0.2 kg. The product origin is the United States.